The second lecture is the correction of the deformation of the column workpiece (2)   4. Correction of bidirectional deformation of box-shaped column There are many types of box-shaped columns, which are composed of different types of steel bars and steel plates of different thicknesses. The smaller steel profiles often produce two-way deformation, as shown in Figure 16. To correct the bidirectional deformation of the column, the method of baking the 90° line on both sides of the deformed column (both sides of the column) can be used to reduce the number of heating zones and improve work efficiency. The correction specification is shown in Fig. 16. The correction of the bidirectional deformation f1 is a right angle heating zone, and the heating form is a single wire belt, which is heated only by the heating zone of the wire strip on the two arch faces of the deformation part; f2 is a one-way deformation, and the conventional one is used. The method of combining triangle and wire; for small deformation, it is corrected by single wire heating method. 5. Correction of deformation of plate strut The plate-stacked column is a column which is welded by a steel plate on four sides. When the plate is erected, the heating area is smaller than that of the same-section steel column. The correction specification for the deformation of the plate strut is shown in Figure 17. The triangular heating zone should be baked on both sides of the column with the same vertical line as the heating zone of the belt. The heating zone is completely red. Figure 17 is a correction of the local deformation of the plate strut. The column has only two planes that are not straight, f1 is the correction of pure two sides, and the double triangle combination heating method is used to correct the deformation perpendicular to the heating zone after correction, using a single line method; f2 is the large deformation of both sides of the column The deformation amount of the other two sides is small, and the triangular-plus-belt heating zone is used for the large deformation amount, and the wire heating zone is adopted for the small deformation amount, the heating sequence is the first triangle, and the rear line has the heating zone. Heavy-duty columns (Fig. 18) After assembly, the rigidity is extremely strong. Before the assembly, the profile steel should be carefully corrected, especially for the I-beam which is the intermediate support. In Fig. 18, f1 is the vertical bending of the column, f2 is the local deformation caused by the irregularity of the I-beam, and f3 is the deformation of the column caused by the vertical bending of the intermediate-supported I-beam. For the correction of f1 deformation, the strong heating zone specification of deep triangle widening belt is adopted; for the correction of f2 deformation, the small triangle widening zone specification of local correction is adopted; for the correction of f3 deformation, the strong heating zone of wide belt is adopted. specification. In the heating zone of the workpiece, the heating time should be increased when the steel plate and the profile steel overlap, so that the heating zone is red-transparent and the correcting ability is improved. Previous Next Ductile Iron Pipe Joint,PVC Pipe Saddle Clamp,Ductile Iron Pipe Fitting-Saddle Ductile iron pipe fittings CO.,Ltd , http://www.ns-valve.com
6. Heavy column deformation correction 